Next Article in Journal
Using eXtreme Gradient BOOSTing to Predict Changes in Tropical Cyclone Intensity over the Western North Pacific
Previous Article in Journal
Hurricane Boundary Layer Height Relative to Storm Motion from GPS Dropsonde Composites
Previous Article in Special Issue
A Hybrid Data-Driven Machine Learning Technique for Evapotranspiration Modeling in Various Climates
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle

Spatiotemporal Variability of Actual Evapotranspiration and the Dominant Climatic Factors in the Pearl River Basin, China

1, 1,2,3,* and 1,2,3
1
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China
2
State Key Lab of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China
3
Guangdong Engineering Technology Research Center of Safety and Greenization for Water Conservancy Project, Guangzhou 510641, China
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(6), 340; https://doi.org/10.3390/atmos10060340
Received: 9 May 2019 / Revised: 9 June 2019 / Accepted: 18 June 2019 / Published: 22 June 2019
(This article belongs to the Special Issue Evapotranspiration Observation and Prediction: Uncertainty Analysis)
  |  
PDF [7088 KB, uploaded 22 June 2019]
  |  

Abstract

Evapotranspiration is a vital component of the land surface process, thus, a more accurate estimate of evapotranspiration is of great significance to agricultural production, research on climate change, and other activities. In order to explore the spatiotemporal variation of evapotranspiration under global climate change in the Pearl River Basin (PRB), in China, this study conducted a simulation of actual evapotranspiration (ETa) during 1960–2014 based on the variable infiltration capacity (VIC) model with a high spatial resolution of 0.05°. The nonparametric Mann–Kendall (M–K) test and partial correlation analysis were used to examine the trends of ETa. The dominant climatic factors impacting on ETa were also examined. The results reveal that the annual ETa across the whole basin exhibited a slight but not significant increasing trend during the 1960–2014 period, whereas a significant decreasing trend was found during the 1960–1992 period. At the seasonal scale, the ETa showed a significant upward trend in summer and a significant downward trend in autumn. At the spatial scale, the ETa generally showed a decreasing, but not significant, trend in the middle and upper stream of the PRB, while in the downstream areas, especially in the Pearl River Delta and Dongjiang River Basin, it exhibited a significant increasing trend. The variation of the ETa was mainly associated with sunshine hours and average air pressure. The negative trend of the ETa in the PRB before 1992 may be due to the significant decrease in sunshine hours, while the increasing trend of the ETa after 1992 may be due to the recovery of sunshine hours and the significant decrease of air pressure. Additionally, we found that the “paradox” phenomenon detected by ETa mainly existed in the middle-upper area of the PRB during the period of 1960–1992. View Full-Text
Keywords: actual evapotranspiration; variable infiltration capacity model; partial correlation coefficient; climatic factor; Pearl River Basin actual evapotranspiration; variable infiltration capacity model; partial correlation coefficient; climatic factor; Pearl River Basin
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Gao, W.; Wang, Z.; Huang, G. Spatiotemporal Variability of Actual Evapotranspiration and the Dominant Climatic Factors in the Pearl River Basin, China. Atmosphere 2019, 10, 340.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Atmosphere EISSN 2073-4433 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top